2002-04 Nissan Altima Dyno-Proven Cold Air Intake System Installation

All 2004 vehicles that are considered LEV2 and SULEV with engine test group numbers of families do not satisfy or meet the California air resource board tet procedures. The engine group test numbers can be found on the underhood information label located on the drivers side. Engine test group numbers listed below are to be considered for off-road use only: 2004 Nissan Alima 2.5L test group number- 4NSXV02.585A
Note: Disconnect the negative battery terminal before starting this installation.
1. Remove the air intake duct, the air intake box and the air vacuum lines connected to the air box. Unbolt the air mass sensor from the air box and set aside at this point. This installation also requires removal of the front bumper and the air resonator box located in the front bumper on the driver side.
2. Take the 2 3/4” straight hose and slip it over the throttle body and use two clamps. Tighten the clamp on the throttle body at this point. (See fig. 2)
3. Remove the m6 bolts holding the bracket on the fender wall as seen in figure 3. Take the vibramount and screw it place.
4. Take the air mass sensor, the billet adapter and butt them together. The 4 four stock m6 x m16 bolts will screw into the billet adapter the adapter has been pretapped for easy installation. Take the 3.00” straight hose and slip it over the round end of the air mass sensor use two clamps and tighten the clamp on the air mass sensor. Press the 3” straight hose over the mouth on the adapter.
5. Take the primary intake and press it into the 2 3/4” straight hose on the throttle body be sure the 5/8” nipple on the intake is pointing in the direction of the breather line. Take the stock breather hose on the valve cover and press it over the 5/8” nipple on the primary intake.
6. The assembled air mass sensor will now be attached over the primary intake. The 3.00” straight hose will fit over the swedged end of the primary intake semi-tighten the clamp to hold the assembled unit in place.

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